Electric fusible cut-out.



E. SGHATTNER.

ELECTRIC FUSIBLE OUT-OUT. APPLICATION FILED JUNE 11,1907.

948,296, Patented Feb. 1, 1910.

25 consists in combin' nanns'r scnar'rnna, or EALING, ENGLAND.

ELECTRIC FUSIBLE CUT-OUT.

Specification of Letters Patent.

Application filed June 11, 1907. Serial No. 378,428.

Patented Feb. 1, 1910.

To all whom it may concern:

Be it known that I, ERNEST SCHATTNER, a subf'ect of the King of Great Britain and Ire and, residing at 48 Culmington road, "6 Ealing, county of Middlesex, England, have invented new and useful-Improvements in Electric Fusible Cut-Outs, of which the following is a s ificationj My invention relates more (particularly to 10 electric fuses of the inclose or cartrldge type n wh1ch granular or powdered material such as sand is used for extinguishingthe arcwhich tends to form between the terminals when the fuse is ruptured. Fuses of 16 this kind when filled with a material like sand which is excellent for extinguishing the arc, have been found to be altogetherunreliable when used on circuits of lar capacity owing to the fact that the sand fi 20 ing becomes conductive at high tempera.

tures and reestablishes the circuit a short time after the fuse has blown.

The primary ob'ect of my invention is to overcome this d culty and to this end it with the fuse means containin a cooling iquid' or gas which is liberated y rupture of the fuse seas to cool down the granular filling and the are which tends to form at the instant of rupture and 80 thereby insure certainty of safe operation.

My invention is illustrated in the accompanying drawing which represents a fuse partial y brokenf way.

4 Referring to the-(drawings, 1 indicates the 86 fuse or cut-out as a whole, having caps 2, 3

provided with suitable lugs 4, 5; The can tridge chamber is comprised within the cylindrical tube of fiber or other suitable material 6 and accommodates the fuse wire 7 in 40 the usual way. The cartridge chamber is 46 filled with a cooling fluid such as water or it may be gas under high ressure. If desired the containers ma be fi led with a liquid or gas which when liberated so as to come into contact with a suitable substance mixed with 50 the sand or other filling material for the cartridge, will chemicall re-act with said substance and suddenly 'berate a large volume of gas helping to cool and extinguish the are.

For example, the sand or other filling for the cartridge may be mixed with bi-carbonate of soda and the fragile container filled with a solution of tartaric acid in water, so that when the container is broken the tartaric acid will combine with the soda, liberating a large volume of carbonic acid gas which acting in conjunction with the liquid will serve to cool down and extinguish the are which tends to be maintained between the fuse terminals upon ru ture of the fuse.

It will be un erstood that the fragile vesselwill be broken or melted to liberate the cooling fluid by the heat or the pressure of the va orized fusible conductor at the instant t e conductor melts 0r vaporizes.

What I claim as new and desire to secure by Letters Patent of the United States is 1. A fusible cut-out comprising in combination a chamber, a fuse and a filling material therein, and means adapted to liberate a coolin fluid on the rupture of the fuse.

2. A usible cut-out comprising in combination a chamber, a fuse therein, filling material within said chamber and means for liberating a cooling fluid to extinguish the arc.

3. A fusible cut-out comprising in combination a chamber, a fuse therein, filling material within said chamber and a frangible vessel containin acooling fluid adapted to be liberated by t e rupture of the fuse.

4. A fusible cut-out comprising in combination a chamber, and a fuse therein, a frangiblevessel containing a cooling fluid located adjacent the fuse-wire and fi ing material withinthe chamber surrounding said fusewire and frangible vessel.

5. Afusible cut-out comprising in combination a chamber, a fuse therein, a frangible vessel containing a fluid ada ted to be 11berated by the rupture of the use, filling material within the chamber surrounding said fuse and frangible vessel and a substance mixed with the filling material capable of chemical reaction with the fluid liberated by the rupture of the fuse.

In witness whereof I have hereunto set my hand this 29th day of Ma 1907.

. ERNEST CHATTNER.

Witnesses:

F. L. RAND, F. J. Sxoxms. 

